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<pre><span class="sourceLineNo">001</span>/* ===========================================================<a name="line.1"></a>
<span class="sourceLineNo">002</span> * JFreeChart : a free chart library for the Java(tm) platform<a name="line.2"></a>
<span class="sourceLineNo">003</span> * ===========================================================<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.<a name="line.5"></a>
<span class="sourceLineNo">006</span> *<a name="line.6"></a>
<span class="sourceLineNo">007</span> * Project Info:  http://www.jfree.org/jfreechart/index.html<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * This library is free software; you can redistribute it and/or modify it<a name="line.9"></a>
<span class="sourceLineNo">010</span> * under the terms of the GNU Lesser General Public License as published by<a name="line.10"></a>
<span class="sourceLineNo">011</span> * the Free Software Foundation; either version 2.1 of the License, or<a name="line.11"></a>
<span class="sourceLineNo">012</span> * (at your option) any later version.<a name="line.12"></a>
<span class="sourceLineNo">013</span> *<a name="line.13"></a>
<span class="sourceLineNo">014</span> * This library is distributed in the hope that it will be useful, but<a name="line.14"></a>
<span class="sourceLineNo">015</span> * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY<a name="line.15"></a>
<span class="sourceLineNo">016</span> * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public<a name="line.16"></a>
<span class="sourceLineNo">017</span> * License for more details.<a name="line.17"></a>
<span class="sourceLineNo">018</span> *<a name="line.18"></a>
<span class="sourceLineNo">019</span> * You should have received a copy of the GNU Lesser General Public<a name="line.19"></a>
<span class="sourceLineNo">020</span> * License along with this library; if not, write to the Free Software<a name="line.20"></a>
<span class="sourceLineNo">021</span> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,<a name="line.21"></a>
<span class="sourceLineNo">022</span> * USA.<a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. <a name="line.24"></a>
<span class="sourceLineNo">025</span> * Other names may be trademarks of their respective owners.]<a name="line.25"></a>
<span class="sourceLineNo">026</span> *<a name="line.26"></a>
<span class="sourceLineNo">027</span> * --------------------<a name="line.27"></a>
<span class="sourceLineNo">028</span> * AbstractDataset.java<a name="line.28"></a>
<span class="sourceLineNo">029</span> * --------------------<a name="line.29"></a>
<span class="sourceLineNo">030</span> * (C)opyright 2000-2008, by Object Refinery Limited.<a name="line.30"></a>
<span class="sourceLineNo">031</span> *<a name="line.31"></a>
<span class="sourceLineNo">032</span> * Original Author:  David Gilbert (for Object Refinery Limited);<a name="line.32"></a>
<span class="sourceLineNo">033</span> * Contributor(s):   Nicolas Brodu (for Astrium and EADS Corporate Research<a name="line.33"></a>
<span class="sourceLineNo">034</span> *                   Center);<a name="line.34"></a>
<span class="sourceLineNo">035</span> *<a name="line.35"></a>
<span class="sourceLineNo">036</span> * Changes (from 21-Aug-2001)<a name="line.36"></a>
<span class="sourceLineNo">037</span> * --------------------------<a name="line.37"></a>
<span class="sourceLineNo">038</span> * 21-Aug-2001 : Added standard header. Fixed DOS encoding problem (DG);<a name="line.38"></a>
<span class="sourceLineNo">039</span> * 18-Sep-2001 : Updated e-mail address in header (DG);<a name="line.39"></a>
<span class="sourceLineNo">040</span> * 15-Oct-2001 : Moved to new package (com.jrefinery.data.*) (DG);<a name="line.40"></a>
<span class="sourceLineNo">041</span> * 22-Oct-2001 : Renamed DataSource.java --&gt; Dataset.java etc. (DG);<a name="line.41"></a>
<span class="sourceLineNo">042</span> * 17-Nov-2001 : Changed constructor from public to protected, created new<a name="line.42"></a>
<span class="sourceLineNo">043</span> *               AbstractSeriesDataset class and transferred series-related<a name="line.43"></a>
<span class="sourceLineNo">044</span> *               methods, updated Javadoc comments (DG);<a name="line.44"></a>
<span class="sourceLineNo">045</span> * 04-Mar-2002 : Updated import statements (DG);<a name="line.45"></a>
<span class="sourceLineNo">046</span> * 11-Jun-2002 : Updated for change in the event constructor (DG);<a name="line.46"></a>
<span class="sourceLineNo">047</span> * 07-Aug-2002 : Changed listener list to use<a name="line.47"></a>
<span class="sourceLineNo">048</span> *               javax.swing.event.EventListenerList (DG);<a name="line.48"></a>
<span class="sourceLineNo">049</span> * 04-Oct-2002 : Fixed errors reported by Checkstyle (DG);<a name="line.49"></a>
<span class="sourceLineNo">050</span> * 27-Mar-2003 : Implemented Serializable (DG);<a name="line.50"></a>
<span class="sourceLineNo">051</span> * 18-Aug-2003 : Implemented Cloneable (DG);<a name="line.51"></a>
<span class="sourceLineNo">052</span> * 08-Sep-2003 : Serialization fixes (NB);<a name="line.52"></a>
<span class="sourceLineNo">053</span> * 11-Sep-2003 : Cloning Fixes (NB);<a name="line.53"></a>
<span class="sourceLineNo">054</span> * 01-Jun-2005 : Added hasListener() method for unit testing (DG);<a name="line.54"></a>
<span class="sourceLineNo">055</span> *<a name="line.55"></a>
<span class="sourceLineNo">056</span> */<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span>package org.jfree.data.general;<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span>import java.io.IOException;<a name="line.60"></a>
<span class="sourceLineNo">061</span>import java.io.InvalidObjectException;<a name="line.61"></a>
<span class="sourceLineNo">062</span>import java.io.ObjectInputStream;<a name="line.62"></a>
<span class="sourceLineNo">063</span>import java.io.ObjectInputValidation;<a name="line.63"></a>
<span class="sourceLineNo">064</span>import java.io.ObjectOutputStream;<a name="line.64"></a>
<span class="sourceLineNo">065</span>import java.io.Serializable;<a name="line.65"></a>
<span class="sourceLineNo">066</span>import java.util.Arrays;<a name="line.66"></a>
<span class="sourceLineNo">067</span>import java.util.EventListener;<a name="line.67"></a>
<span class="sourceLineNo">068</span>import java.util.List;<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span>import javax.swing.event.EventListenerList;<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span>/**<a name="line.72"></a>
<span class="sourceLineNo">073</span> * An abstract implementation of the {@link Dataset} interface, containing a<a name="line.73"></a>
<span class="sourceLineNo">074</span> * mechanism for registering change listeners.<a name="line.74"></a>
<span class="sourceLineNo">075</span> */<a name="line.75"></a>
<span class="sourceLineNo">076</span>public abstract class AbstractDataset implements Dataset, Cloneable,<a name="line.76"></a>
<span class="sourceLineNo">077</span>        Serializable, ObjectInputValidation {<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span>    /** For serialization. */<a name="line.79"></a>
<span class="sourceLineNo">080</span>    private static final long serialVersionUID = 1918768939869230744L;<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>    /** The group that the dataset belongs to. */<a name="line.82"></a>
<span class="sourceLineNo">083</span>    private DatasetGroup group;<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>    /** Storage for registered change listeners. */<a name="line.85"></a>
<span class="sourceLineNo">086</span>    private transient EventListenerList listenerList;<a name="line.86"></a>
<span class="sourceLineNo">087</span><a name="line.87"></a>
<span class="sourceLineNo">088</span>    /**<a name="line.88"></a>
<span class="sourceLineNo">089</span>     * Constructs a dataset. By default, the dataset is assigned to its own<a name="line.89"></a>
<span class="sourceLineNo">090</span>     * group.<a name="line.90"></a>
<span class="sourceLineNo">091</span>     */<a name="line.91"></a>
<span class="sourceLineNo">092</span>    protected AbstractDataset() {<a name="line.92"></a>
<span class="sourceLineNo">093</span>        this.group = new DatasetGroup();<a name="line.93"></a>
<span class="sourceLineNo">094</span>        this.listenerList = new EventListenerList();<a name="line.94"></a>
<span class="sourceLineNo">095</span>    }<a name="line.95"></a>
<span class="sourceLineNo">096</span><a name="line.96"></a>
<span class="sourceLineNo">097</span>    /**<a name="line.97"></a>
<span class="sourceLineNo">098</span>     * Returns the dataset group for the dataset.<a name="line.98"></a>
<span class="sourceLineNo">099</span>     *<a name="line.99"></a>
<span class="sourceLineNo">100</span>     * @return The group (never &lt;code&gt;null&lt;/code&gt;).<a name="line.100"></a>
<span class="sourceLineNo">101</span>     *<a name="line.101"></a>
<span class="sourceLineNo">102</span>     * @see #setGroup(DatasetGroup)<a name="line.102"></a>
<span class="sourceLineNo">103</span>     */<a name="line.103"></a>
<span class="sourceLineNo">104</span>    public DatasetGroup getGroup() {<a name="line.104"></a>
<span class="sourceLineNo">105</span>        return this.group;<a name="line.105"></a>
<span class="sourceLineNo">106</span>    }<a name="line.106"></a>
<span class="sourceLineNo">107</span><a name="line.107"></a>
<span class="sourceLineNo">108</span>    /**<a name="line.108"></a>
<span class="sourceLineNo">109</span>     * Sets the dataset group for the dataset.<a name="line.109"></a>
<span class="sourceLineNo">110</span>     *<a name="line.110"></a>
<span class="sourceLineNo">111</span>     * @param group  the group (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.111"></a>
<span class="sourceLineNo">112</span>     *<a name="line.112"></a>
<span class="sourceLineNo">113</span>     * @see #getGroup()<a name="line.113"></a>
<span class="sourceLineNo">114</span>     */<a name="line.114"></a>
<span class="sourceLineNo">115</span>    public void setGroup(DatasetGroup group) {<a name="line.115"></a>
<span class="sourceLineNo">116</span>        if (group == null) {<a name="line.116"></a>
<span class="sourceLineNo">117</span>            throw new IllegalArgumentException("Null 'group' argument.");<a name="line.117"></a>
<span class="sourceLineNo">118</span>        }<a name="line.118"></a>
<span class="sourceLineNo">119</span>        this.group = group;<a name="line.119"></a>
<span class="sourceLineNo">120</span>    }<a name="line.120"></a>
<span class="sourceLineNo">121</span><a name="line.121"></a>
<span class="sourceLineNo">122</span>    /**<a name="line.122"></a>
<span class="sourceLineNo">123</span>     * Registers an object to receive notification of changes to the dataset.<a name="line.123"></a>
<span class="sourceLineNo">124</span>     *<a name="line.124"></a>
<span class="sourceLineNo">125</span>     * @param listener  the object to register.<a name="line.125"></a>
<span class="sourceLineNo">126</span>     *<a name="line.126"></a>
<span class="sourceLineNo">127</span>     * @see #removeChangeListener(DatasetChangeListener)<a name="line.127"></a>
<span class="sourceLineNo">128</span>     */<a name="line.128"></a>
<span class="sourceLineNo">129</span>    public void addChangeListener(DatasetChangeListener listener) {<a name="line.129"></a>
<span class="sourceLineNo">130</span>        this.listenerList.add(DatasetChangeListener.class, listener);<a name="line.130"></a>
<span class="sourceLineNo">131</span>    }<a name="line.131"></a>
<span class="sourceLineNo">132</span><a name="line.132"></a>
<span class="sourceLineNo">133</span>    /**<a name="line.133"></a>
<span class="sourceLineNo">134</span>     * Deregisters an object so that it no longer receives notification of<a name="line.134"></a>
<span class="sourceLineNo">135</span>     * changes to the dataset.<a name="line.135"></a>
<span class="sourceLineNo">136</span>     *<a name="line.136"></a>
<span class="sourceLineNo">137</span>     * @param listener  the object to deregister.<a name="line.137"></a>
<span class="sourceLineNo">138</span>     *<a name="line.138"></a>
<span class="sourceLineNo">139</span>     * @see #addChangeListener(DatasetChangeListener)<a name="line.139"></a>
<span class="sourceLineNo">140</span>     */<a name="line.140"></a>
<span class="sourceLineNo">141</span>    public void removeChangeListener(DatasetChangeListener listener) {<a name="line.141"></a>
<span class="sourceLineNo">142</span>        this.listenerList.remove(DatasetChangeListener.class, listener);<a name="line.142"></a>
<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>    /**<a name="line.145"></a>
<span class="sourceLineNo">146</span>     * Returns &lt;code&gt;true&lt;/code&gt; if the specified object is registered with<a name="line.146"></a>
<span class="sourceLineNo">147</span>     * the dataset as a listener.  Most applications won't need to call this<a name="line.147"></a>
<span class="sourceLineNo">148</span>     * method, it exists mainly for use by unit testing code.<a name="line.148"></a>
<span class="sourceLineNo">149</span>     *<a name="line.149"></a>
<span class="sourceLineNo">150</span>     * @param listener  the listener.<a name="line.150"></a>
<span class="sourceLineNo">151</span>     *<a name="line.151"></a>
<span class="sourceLineNo">152</span>     * @return A boolean.<a name="line.152"></a>
<span class="sourceLineNo">153</span>     *<a name="line.153"></a>
<span class="sourceLineNo">154</span>     * @see #addChangeListener(DatasetChangeListener)<a name="line.154"></a>
<span class="sourceLineNo">155</span>     * @see #removeChangeListener(DatasetChangeListener)<a name="line.155"></a>
<span class="sourceLineNo">156</span>     */<a name="line.156"></a>
<span class="sourceLineNo">157</span>    public boolean hasListener(EventListener listener) {<a name="line.157"></a>
<span class="sourceLineNo">158</span>        List list = Arrays.asList(this.listenerList.getListenerList());<a name="line.158"></a>
<span class="sourceLineNo">159</span>        return list.contains(listener);<a name="line.159"></a>
<span class="sourceLineNo">160</span>    }<a name="line.160"></a>
<span class="sourceLineNo">161</span><a name="line.161"></a>
<span class="sourceLineNo">162</span>    /**<a name="line.162"></a>
<span class="sourceLineNo">163</span>     * Notifies all registered listeners that the dataset has changed.<a name="line.163"></a>
<span class="sourceLineNo">164</span>     *<a name="line.164"></a>
<span class="sourceLineNo">165</span>     * @see #addChangeListener(DatasetChangeListener)<a name="line.165"></a>
<span class="sourceLineNo">166</span>     */<a name="line.166"></a>
<span class="sourceLineNo">167</span>    protected void fireDatasetChanged() {<a name="line.167"></a>
<span class="sourceLineNo">168</span>        notifyListeners(new DatasetChangeEvent(this, this));<a name="line.168"></a>
<span class="sourceLineNo">169</span>    }<a name="line.169"></a>
<span class="sourceLineNo">170</span><a name="line.170"></a>
<span class="sourceLineNo">171</span>    /**<a name="line.171"></a>
<span class="sourceLineNo">172</span>     * Notifies all registered listeners that the dataset has changed.<a name="line.172"></a>
<span class="sourceLineNo">173</span>     *<a name="line.173"></a>
<span class="sourceLineNo">174</span>     * @param event  contains information about the event that triggered the<a name="line.174"></a>
<span class="sourceLineNo">175</span>     *               notification.<a name="line.175"></a>
<span class="sourceLineNo">176</span>     *<a name="line.176"></a>
<span class="sourceLineNo">177</span>     * @see #addChangeListener(DatasetChangeListener)<a name="line.177"></a>
<span class="sourceLineNo">178</span>     * @see #removeChangeListener(DatasetChangeListener)<a name="line.178"></a>
<span class="sourceLineNo">179</span>     */<a name="line.179"></a>
<span class="sourceLineNo">180</span>    protected void notifyListeners(DatasetChangeEvent event) {<a name="line.180"></a>
<span class="sourceLineNo">181</span><a name="line.181"></a>
<span class="sourceLineNo">182</span>        Object[] listeners = this.listenerList.getListenerList();<a name="line.182"></a>
<span class="sourceLineNo">183</span>        for (int i = listeners.length - 2; i &gt;= 0; i -= 2) {<a name="line.183"></a>
<span class="sourceLineNo">184</span>            if (listeners[i] == DatasetChangeListener.class) {<a name="line.184"></a>
<span class="sourceLineNo">185</span>                ((DatasetChangeListener) listeners[i + 1]).datasetChanged(<a name="line.185"></a>
<span class="sourceLineNo">186</span>                        event);<a name="line.186"></a>
<span class="sourceLineNo">187</span>            }<a name="line.187"></a>
<span class="sourceLineNo">188</span>        }<a name="line.188"></a>
<span class="sourceLineNo">189</span><a name="line.189"></a>
<span class="sourceLineNo">190</span>    }<a name="line.190"></a>
<span class="sourceLineNo">191</span><a name="line.191"></a>
<span class="sourceLineNo">192</span>    /**<a name="line.192"></a>
<span class="sourceLineNo">193</span>     * Returns a clone of the dataset. The cloned dataset will NOT include the<a name="line.193"></a>
<span class="sourceLineNo">194</span>     * {@link DatasetChangeListener} references that have been registered with<a name="line.194"></a>
<span class="sourceLineNo">195</span>     * this dataset.<a name="line.195"></a>
<span class="sourceLineNo">196</span>     *<a name="line.196"></a>
<span class="sourceLineNo">197</span>     * @return A clone.<a name="line.197"></a>
<span class="sourceLineNo">198</span>     *<a name="line.198"></a>
<span class="sourceLineNo">199</span>     * @throws CloneNotSupportedException  if the dataset does not support<a name="line.199"></a>
<span class="sourceLineNo">200</span>     *                                     cloning.<a name="line.200"></a>
<span class="sourceLineNo">201</span>     */<a name="line.201"></a>
<span class="sourceLineNo">202</span>    public Object clone() throws CloneNotSupportedException {<a name="line.202"></a>
<span class="sourceLineNo">203</span>        AbstractDataset clone = (AbstractDataset) super.clone();<a name="line.203"></a>
<span class="sourceLineNo">204</span>        clone.listenerList = new EventListenerList();<a name="line.204"></a>
<span class="sourceLineNo">205</span>        return clone;<a name="line.205"></a>
<span class="sourceLineNo">206</span>    }<a name="line.206"></a>
<span class="sourceLineNo">207</span><a name="line.207"></a>
<span class="sourceLineNo">208</span>    /**<a name="line.208"></a>
<span class="sourceLineNo">209</span>     * Handles serialization.<a name="line.209"></a>
<span class="sourceLineNo">210</span>     *<a name="line.210"></a>
<span class="sourceLineNo">211</span>     * @param stream  the output stream.<a name="line.211"></a>
<span class="sourceLineNo">212</span>     *<a name="line.212"></a>
<span class="sourceLineNo">213</span>     * @throws IOException if there is an I/O problem.<a name="line.213"></a>
<span class="sourceLineNo">214</span>     */<a name="line.214"></a>
<span class="sourceLineNo">215</span>    private void writeObject(ObjectOutputStream stream) throws IOException {<a name="line.215"></a>
<span class="sourceLineNo">216</span>        stream.defaultWriteObject();<a name="line.216"></a>
<span class="sourceLineNo">217</span>    }<a name="line.217"></a>
<span class="sourceLineNo">218</span><a name="line.218"></a>
<span class="sourceLineNo">219</span>    /**<a name="line.219"></a>
<span class="sourceLineNo">220</span>     * Restores a serialized object.<a name="line.220"></a>
<span class="sourceLineNo">221</span>     *<a name="line.221"></a>
<span class="sourceLineNo">222</span>     * @param stream  the input stream.<a name="line.222"></a>
<span class="sourceLineNo">223</span>     *<a name="line.223"></a>
<span class="sourceLineNo">224</span>     * @throws IOException if there is an I/O problem.<a name="line.224"></a>
<span class="sourceLineNo">225</span>     * @throws ClassNotFoundException if there is a problem loading a class.<a name="line.225"></a>
<span class="sourceLineNo">226</span>     */<a name="line.226"></a>
<span class="sourceLineNo">227</span>    private void readObject(ObjectInputStream stream)<a name="line.227"></a>
<span class="sourceLineNo">228</span>        throws IOException, ClassNotFoundException {<a name="line.228"></a>
<span class="sourceLineNo">229</span>        stream.defaultReadObject();<a name="line.229"></a>
<span class="sourceLineNo">230</span>        this.listenerList = new EventListenerList();<a name="line.230"></a>
<span class="sourceLineNo">231</span>        stream.registerValidation(this, 10);  // see comments about priority of<a name="line.231"></a>
<span class="sourceLineNo">232</span>                                              // 10 in validateObject()<a name="line.232"></a>
<span class="sourceLineNo">233</span>    }<a name="line.233"></a>
<span class="sourceLineNo">234</span><a name="line.234"></a>
<span class="sourceLineNo">235</span>    /**<a name="line.235"></a>
<span class="sourceLineNo">236</span>     * Validates the object. We use this opportunity to call listeners who have<a name="line.236"></a>
<span class="sourceLineNo">237</span>     * registered during the deserialization process, as listeners are not<a name="line.237"></a>
<span class="sourceLineNo">238</span>     * serialized. This method is called by the serialization system after the<a name="line.238"></a>
<span class="sourceLineNo">239</span>     * entire graph is read.<a name="line.239"></a>
<span class="sourceLineNo">240</span>     *<a name="line.240"></a>
<span class="sourceLineNo">241</span>     * This object has registered itself to the system with a priority of 10.<a name="line.241"></a>
<span class="sourceLineNo">242</span>     * Other callbacks may register with a higher priority number to be called<a name="line.242"></a>
<span class="sourceLineNo">243</span>     * before this object, or with a lower priority number to be called after<a name="line.243"></a>
<span class="sourceLineNo">244</span>     * the listeners were notified.<a name="line.244"></a>
<span class="sourceLineNo">245</span>     *<a name="line.245"></a>
<span class="sourceLineNo">246</span>     * All listeners are supposed to have register by now, either in their<a name="line.246"></a>
<span class="sourceLineNo">247</span>     * readObject or validateObject methods. Notify them that this dataset has<a name="line.247"></a>
<span class="sourceLineNo">248</span>     * changed.<a name="line.248"></a>
<span class="sourceLineNo">249</span>     *<a name="line.249"></a>
<span class="sourceLineNo">250</span>     * @exception InvalidObjectException If the object cannot validate itself.<a name="line.250"></a>
<span class="sourceLineNo">251</span>     */<a name="line.251"></a>
<span class="sourceLineNo">252</span>    public void validateObject() throws InvalidObjectException {<a name="line.252"></a>
<span class="sourceLineNo">253</span>        fireDatasetChanged();<a name="line.253"></a>
<span class="sourceLineNo">254</span>    }<a name="line.254"></a>
<span class="sourceLineNo">255</span><a name="line.255"></a>
<span class="sourceLineNo">256</span>}<a name="line.256"></a>




























































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